We therefore have words like halogen, halide, halotrichite and halocarbon.
2.
It occurs with melanterite, alunogen, fibroferrite, halotrichite, botryogen, butlerite and amarantite.
3.
It forms a series with halotrichite.
4.
It occurs associated with pyrite, marcasite, halotrichite, pickeringite, epsomite, potash alum, melanterite and gypsum.
5.
A pseudo alum is a double sulfate of the typical formula, where " A " is a divalent metal ion, such as cobalt ( wupatkiite ), manganese ( apjohnite ), magnesium ( pickingerite ) or iron ( halotrichite or feather alum ), and " B " is a trivalent metal ion.
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